A.W. Tozer warns against the danger of hardening one's heart against God's Word, emphasizing that such a state arises from selfishness and a love for darkness. He illustrates how covetousness leads individuals to ignore the needs of others, ultimately freezing their capacity for generosity and disrupting the natural order. Tozer argues that neglecting the truth and refusing to act on the impulses of righteousness can stifle spiritual life and grieve the Holy Spirit. He urges believers to embrace truth and respond to the call of righteousness for the sake of their souls.